co ruby používá pro
Its mainly used for web apps but since it has similiar sntax to python you can also use it for data analysis and prototyping.
ruby pro programátory
irb(main):007:0> a = 3 ** 2
=> 9
irb(main):008:0> b = 4 ** 2
=> 16
irb(main):009:0> Math.sqrt(a+b)
=> 5.0